noun \ˈpes-tə-ˌsīd\

: a chemical that is used to kill animals or insects that damage plants or crops

Full Definition of PESTICIDE

:  an agent used to destroy pests
pes·ti·ci·dal \ˌpes-tə-ˈsī-dəl\ adjective

First Known Use of PESTICIDE

circa 1925


noun \ˈpes-tə-ˌsīd\   (Medical Dictionary)

Medical Definition of PESTICIDE

: an agent used to destroy pests


noun    (Concise Encyclopedia)

Any toxic substance used to kill animals or plants that damage crops or ornamental plants or that are hazardous to the health of domestic animals or humans. All pesticides act by interfering with the target species' normal metabolism. They are often classified by the type of organism they are intended to control (e.g., insecticide, herbicide, fungicide). Some inadvertently affect other organisms in the environment, either directly by their toxic effects or via elimination of the target organism.


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